Method: We used the following amino acids replacements and deletions in
Spike for each lineage-based COG-UK defined changes for each lineage; Beta (B1.351;
L18F,
D80A,
D215G,
R246L,
K417N,
E484K,
N501Y,
A701V), Gamma (P.1;
L18F,
T20N,
P26S,
D138Y,
R190S,
K417T,
E484K,
N501Y H655Y,
T1027I), Alpha (B.1.1.7; Delta69-70, D144,
PMID: 34536797
2021
Virology
Result: Few NTD mutations, namely
T20N,
P26S,
D138Y, and
R190S, likely contributed to the increase in ACE2 binding, with ~2, ~1.6, ~1.3 and ~1.8- fold increase compared to
D614G, respectively.
Result: In the P.1
Spike we observed mutations in the NTD that decreased recognition (
P26S,
D138Y, and
R190S).
Result: Our results show that all the NTD mutations, namely
L18F,
T20N,
P26S,
D138Y and
R190S, attenuated the binding of naive-vaccinated plasma Abs.